PP-DSE PHY

HONG KONG EXAMINATIONS AND ASSESSMENT AUTHORITY

HONG KONG DIPLOMA OF SECONDARY EDUCATION EXAMINATION

PRACTICE PAPER

PHYSICS PAPER 1

(2 hours 30 minutes)

This paper must be answered in English

GENERAL INSTRUCTIONS

1. There are TWO sections, A and B, in this Paper. You are advised to伽sh Section A in about60 minutes.

2. Section A consists of multiple-choice questions in this question paper, while Section B containsconventional questions printed separately in Question-Answer Book B.

3. Answers to Section A should be marked on the Multiple-choice Answer Sheet while answers toSection B should be written in the spaces provided in Question-Answer Book B. The AnswerSheet for Section A and the Question-Answer Book for Section B wi l l be collectedseparately at the end of the examination.

4. The diagrams in this paper are NOT necessarily drawn to scale

5. The last pages of this question paper contain a list of data, formulae and relationships whichyou may find useful.

INSTRUCTIONS FOR SECTION A (MULTIPLE-CHOICE QUESTIONS)

1. Read carefully the instructions on the Answer Sheet. After the announcement of the start of theexamination, you should first stick a barcode label and insert the information required in the spacesprovided. No extra time will be given for sticking on the barcode label after the'Time is up'announcement.

2. When told to open this book, you should check that all the questions are there. Look for the words'END OF SECTION A'after the last question.

3. All questions carry equal marks

4. ANSWER ALL QUESTIONS. You are advised to use an HB pencil to mark all the answers on theAnswer Sheet, so that wrong marks can be completely erased with a clean rubber. You must markthe answers clearly; otherwise you will lose marks if the answers cannot be captured

5. You should mark only ONE answer for each question. If you mark more than one answer, you willreceive NO MARKS for that question.

6. No marks will be deducted for wrong answers.

©香港考試及評核局 保留版權Hong Kong Examinations and Assessment Authority All Rights Reserved 2012

PP-DSE-PHY lA-1

Not to be taken away before the end of the examination session

There are 36 questions. Questions marked with "*" invoh1e knowledge of the extension component.

Section A

I. The graphs below show how the electtical resistances R of three different circuit elements change withtemperature 0. Which of the面cuit elen1eots can be used to measure temperature ?

(I)

(3)

R/Q

RIQ

A. (l)onlyB. (2) onlyC. (1) and (3) onlyD. (2) and (3) only

(2)

R/Q

01°c 01

°c

01°c

2 . In眼figure below, a training pool Bis located next to the main pool A. The training pool B has a smaller area and is shallower. If the pools are under tl1e sunlight at the same time, which of the following statements about the rise in the water temperature of the two pools is correct? Assume that the initial water temperatures of the pools are the same.

main pool A

A. The water tempernture of training pool B rises faster because it is shallower.B. The water temperature of training pool B rises faster because it has a smaller surface

area.C. The water temperature of main pool A rises faster because it is deeperD. The water temperature of main pool A rises faster because it has a larger surface area.

PP-DSE-PHY JA-2

PP-DSE-PHY 1A–19 19

List of data, formulae and relationships

Data

molar gas constant R = 8.31 J mol−1

K−1

Avogadro constant NA = 6.02 × 1023

mol−1

acceleration due to gravity g = 9.81 m s−2

(close to the Earth)

universal gravitational constant G = 6.67 × 10−11

N m2 kg

−2

speed of light in vacuum c = 3.00 × 108 m s

−1

charge of electron e = 1.60 × 10−19

C

electron rest mass me = 9.11 × 10−31

kg

permittivity of free space ε0 = 8.85 × 10−12

C2 N

−1 m

−2

permeability of free space µ0 = 4π × 10−7

H m−1

atomic mass unit u = 1.661 � 10−27

kg (1 u is equivalent to 931 MeV)

astronomical unit AU = 1.50 � 1011

m

light year ly = 9.46 � 1015

m

parsec pc = 3.09 � 1016

m = 3.26 ly = 206265 AU

Stefan constant σ = 5.67 � 10−8

W m−2

K−4

Planck constant h = 6.63 × 10−34

J s

Rectilinear motion

For uniformly accelerated motion :

v = u + at

s = ut +2

2

1at

v2 = u

2 + 2as

Mathematics

Equation of a straight line y = mx + c

Arc length = r θ

Surface area of cylinder = 2πrh + 2πr2

Volume of cylinder = πr2h

Surface area of sphere = 4πr2

Volume of sphere = 3

3

4rπ

For small angles, sin θ ≈ tan θ ≈ θ (in radians)

Astronomy and Space Science

r

GMmU −= gravitational potential energy

P = σΑT 4

Stefan’s law

00λ

λ∆≈≈

∆

c

v

f

fDoppler effect

Energy and Use of Energy

d

TTAk

t

Q )( CH −= rate of energy transfer by conduction

d

kU = thermal transmittance U-value

3

2

1ρAvP = maximum power by wind turbine

Atomic World

2

1me φ−= hfv

2

maxEinstein’s photoelectric equation

22

0

2

4

e

2n

6.13

8

1

nh

em

nE −=

−=ε

eV

energy level equation for hydrogen atom

mv

h

p

h==λ de Broglie formula

d

λθ

22.1≈ Rayleigh criterion (resolving power)

Medical Physics

d

λθ

22.1≈ Rayleigh criterion (resolving power)

power

f

1= power of a lens

L =

0

log10I

Iintensity level (dB)

Z = ρ c acoustic impedance

2

12

2

12

0

r

)(

)(

ZZ

ZZ

I

I

+

−==α intensity reflection coefficient

µxII −= e0

transmitted intensity through a medium

PP-DSE-PHY 1A–20 20

A1. E = mc ∆Tenergy transfer during heating

and cooling D1.

2

0

21

π4 r

QQF

ε= Coulomb’s law

A2. E = l ∆menergy transfer during change

of state D2.

2

0π4 r

QE

ε= electric field strength due to

a point charge

A3. nRTpV = equation of state for an ideal gas D3. r

QV

0π4 ε

= electric potential due to

a point charge

A4. pV Nmc=1

3

2kinetic theory equation D4.

d

VE =

electric field between parallel plates

(numerically)

A5. EK =

A2

3

N

RTmolecular kinetic energy D5. nAvQI = general current flow equation

D6. Rl

A=

ρresistance and resistivity

B1. F = mt

p

t

v

∆

∆=

∆

∆Force D7. R = R1 + R2 resistors in series

B2. moment = F � d moment of a force D8.

21

111

RRR+= resistors in parallel

B3. EP = mgh gravitational potential energy D9. RIIVP 2== power in a circuit

B4. EK =2

2

1mv kinetic energy D10. θsin vBQF = force on a moving charge in a

magnetic field

B5. P = Fv =t

Wmechanical power D11. F BIl= sinθ

force on a current-carrying

conductor in a magnetic field

B6. rr

va

2

2

ω== centripetal acceleration D12. VBI

nQt= Hall voltage

B7. FGm m

r= 1 2

2Newton’s law of gravitation D13.

r

IB

π2

0µ=

magnetic field due to a long

straight wire

D14. l

NIB 0µ

=magnetic field inside a long

solenoid

C1. a

Dy

λ=∆

fringe width in

double-slit interference D15.

t

ΦN

∆

∆=ε induced e.m.f.

C2. d nsinθ λ= diffraction grating equation D16.

p

s

p

s

N

N

V

V≈ ratio of secondary voltage to

primary voltage in a transformer

C3. fvu

111=+ equation for a single lens

E1. N = N0e−kt

law of radioactive decay

E2. tk

1

2

2=

lnhalf-life and decay constant

E3. A = kNactivity and the number of

undecayed nuclei

E4. E mc= 2 mass-energy relationship